Study Sheds Light on Why Humans Walk on Two Legs

A team of anthropologists that studied chimpanzees trained to use treadmills has gathered new evidence suggesting that our earliest apelike ancestors started walking on two legs because it required less energy than getting around on all fours.

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<p><a href="http://www.physorg.com/news104162325.html">Study Sheds Light on Why Humans Walk on Two Legs</a></p> <p>A team of anthropologists that studied chimpanzees trained to use treadmills has gathered new evidence suggesting that our earliest apelike ancestors started walking on two legs because it required less energy than getting around on all fours.</p>